Coupling for subcaliber or practice barrels



K. WEISS COUPLING FOR SUBCALIBER OR PRACTICE 'BARRELS Filed Feb. 14,1924 Karl Weiss ?atented Dec. 2, 1924..

raueze KARL WEISS, 0E NUREMBERG,'GER1VIANY.

COUPLING'FOR SUBCALIBER OR PRACTICE BABE-HE'S.

Application filed February -14, 132d. 'SerialN'o. 692,731.

To all whom it may concern:

Be it known that I, KARL VVEIss, acitizen of the German Republic, and aresident of Nuremberg, Germany, have invented a certain new and usefulImprovement in Couplings for Subcaliberor Practice Barrels, of which thefollowing is a specification.

This invention relates to means for fastening auxiliary barrels forvfire arms, .especially pistols, and consists essentially in a simpledevice for fastening said auxiliary barrel within the main barrel of thepistol and readily adjust the former within the latter.

My invention is illustrated by way of example in the accompanying"drawing in which Figure 1 is partly a side-view of, and partly an axialsection through, a pistol constructed according to the invention; Figure3 is a separate side-view of the auxiliary barrel, and Figure 2comprises perspective illustrations of three details which, althoughordinarily connected with each other, are here shown separated for thesake of distinctness.

In order to render fire arms of relatively great caliber more suitablefor the purpose of practicing within houses or closed rooms, thediameter of the main barrel must be reduced in order to enable one touse ammunition of smaller caliber for the purpose of mere practicing.The known construction serving this purpose, therefore, relatesessentially to the way of introducing and fastening an auxiliary barrelof smaller diameter within the main barrel of greater diameter. Myinvention is designed to obviate certain drawbacks, which are connectedwith the constructions heretofore in use or proosed, said drawbacksconsisting mainly in the diiliculty of introducing and extracting theauxiliary barrel into and from the main barrel and of handling thepistol in general; in addition to this my invention obviates thedisadvantages of the special fastening devices of known construction byproviding a device of this kind which is solely fastened upon the muzzleof the barrel and which further permits a line adjustment of theauxiliary barrel within the main one.

Owing to the possibility of bringing the auxiliary barrel into anydesired position with respect to the closure of the main barrel, therebyaffording the possibility of regulating the sensitiveness of thesmall-caliber ammunition for practicing purposes the largest limits.

In addition to this, the fastening device according to my invention willpermit ,to compensate for the, lateral deviation of ,the bullet bymerely rotating the auxiliarybarrel within the main barrel for anydesired angle. 6 a

The ancillarybarrel 3, as shown in Fig. 3 is provided at its front endwith a screwthread .9, .upon which the :threaded nut 8 is mountedserving as a lock-nut. The sleeve 5 ismade in the form ofa bayonetlockand is mounted upon the muzzle of the barrel and thereupon rotatedand latched behind the sight l. In order to firmly connect the sleeve 5with the muzzle of the barrel, the former is provided with a femalethread within its central bore, an adjusting screw 6, 7 being introducedwithin said thread and having also a central bore with a female threadtherein. The adjusting screw, therefore, as can be seen from Fig. 1shows the parts assembled, may be screwed into the sleeve 5, whereby theformer will be pressed against the muzzle of the barrel and draws thesleeve 5 tight against the sight 4.

Thereupon the auxiliary barrel is introduced into the main barrel 2 ofthe pistol, until the thread 9 will abut against the female thread ofthe adjusting screw 6, 7 whereupon the inlet barrel may be screwed intothe adjusting screw 6, 7 to such an extent that the rear end of theinlet barrel will have the desired correct position relatively to theclosure of the fire arm 1. The lock nut 6, which is mounted upon theauxiliary barrel, is now screwed against the head 7 of the adjustingscrew 6, so that the auxiliary barrel will be kept firmly within themain barrel 2 and screwed against any motion, in longitudinal or rotarysense, relatively to the latter. It is quite clear that only thelock-nut 8 need to be unscrewed if it is desired to change the positionof the muzzle of the auxiliary barrel relatively to the bolt of the firearm; the auxiliary barrel may thus be adjusted to any desired extent inthe direction of its axis. It is further understood that in case of alateral deviation of the bullet, the fire arm may be adjusted byrotating the auxiliary barrel for a small angle; the longitudinaldisplacement in this case is so small, that it may be entirelyneglected.

My invention, in its essence, therefore, consists therein, that a sleeve5 is employed as a fastening device, said sleeve being fastened in anydesired manner upon the muzzle of the barrel. This sleeve will thusserve as supporting member, upon which the remaining parts of the deviceare mounted directly or indirectly.

There are various other modes of fastening the sleeve 5 upon the muzzleof the barrel, and the form of fastening shown in the drawing is only apreferred embodiment of my invention, because the sight & of the firearm may be conveniently used for fastening the sleeve 5. It is obviousthat any mode of fastening said sleeve, which is difierent from thatshown and described herein, will not depart fromthe gist of myinvention.

I claim:

1. In a device of the character described, the combination of a main anda threaded auxiliary barrel with a sleeve mounted upon the main barrel,said sleeve being adapted to receive said auxiliary barrel in a threadedcentral bore, and an adjusting screw mounted on the threaded portion ofsaid auxiliary barrel and adapted to abut against the muzzle of the mainbarrel, said adjusting screw having a central bore in longitudinaldirection for receiving said auxiliary barrel.

2. In a device of the character described, the combination of a main anda threaded auxiliary barrel with a. sleeve mounted upon the main barrel,said sleeve being adapted to receive said inlet barrel in a threadedcentral bore and an adjusting screw interposed between the threadedcentral bore of said auxiliary barrel and adapted to abut against themuzzle of the main barrel, said adjusting screw "having a central borein longitudinal direction for receiving said auxiliary barrel, a counternut for fastening said auxiliary barrel, when inserted into said sleeve,said counter-nut serving for locking said auxiliary barrel.

In testimony whereof I afiix my signature in presence of two witnesses.

KARL WEISS. Witnesses:

PAUL DREz, ELsm BAER.

